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When the underlying vector is displaced on another array, and potentially with a fill pointer below its capacity, we need to do some pointer arithmetic. We use babel to extract the underlying simple array because it's already a transitive dependency via cffi.
vindvaki
commented
Jul 10, 2024
We can just put start 0 and end nil. The underlying library figures out the right values.
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Actually, I'm seeing some possible performance regressions locally with this patch. Need to investigate. |
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The performance impact was due to some other changes in my program, not this contribution. |
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When the underlying vector is displaced on another array, and potentially with a fill pointer below its capacity, we need to do some pointer arithmetic. We use babel to extract the underlying simple array because it's already a transitive dependency via cffi.
Without this patch, I have to copy non-simple vectors before inserting, which is wasteful.